Column clamp



wi B. LEONARD.

COLUMN CLAMP.

APPLICATION FILED IULY 15|I1920.

1,403,042', Patented Jan, 10, 1922.x

I E EE @um WILLIAM B. LEONARD, OF CHICAGO, ILLINOIS.

COLUMN CLAMP.

To all lzo from it may concern Be it known that l, lViLLmM B. LEONARD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Column Clamp, of which the following is a specification.

The object of my invention is to produce an eflicient device primarily designed for clamping together the several sections of a hollow form for the reception of fresh concrete, and of such character, that it may be repez'ltedly used and readily removed when the concrete has hardened. While the deiice has been primarily designed. for use as a clamp for column forms, it will be readily understood that such use is not limited.

rlhe accompanying drawings illustrate my invention. Fig. 1 is a transverse section of a device embodying my invention, in clamping position upon a column form; Fig. 2 is a perspective view of the main body of the structure, with the intermediate portion of the clamping ribbon omitted.

In the drawing, 10 indicates a main body casting comprising a pair of parallel side flanges 11, 11, with a footing plate 12 between the same, said footing plate being preferably of a form comprising diverging lingers or portions 12, adapted to embrace a corner of the column form 13.

Each of the side plates 11 is provided at its outer edge with open-ended slots, or notches 13, 13, which form seats or journals for the axes 14: of the winding drums 15, said winding drums being provided with end flanges 1G, perforated with a multiplicity of circumferentially spaced holes 17. The main body of each drum is diametii cally slotted at 18, so that one end of a steel ribbon 19 may be inserted therein, and then wrapped around the body of the drum, there-by securing' the ribbon to the drum. Pins 20, when passed through perforations 17, may engage a side wall of the adjacent notch 13 and thus loch a drum against reverse rotation under the tension of ribbon 19.

Plates 11 are also perforated at 21, 21, so that the pins 20 may be inserted therethrough and through an alined pair of perforations 17, to retain the drums in placeduring transportation of the device, and it is convenient that these perforations 21 be so placed that they will not register with a perforation 17 when a pair of perforations 17 are in appropriate locking position relative Specification of Letters Patent.

Patented Jan. 10, 1922. 1920, sei-iai No. 396,370.

to a side wall of notch 13, thereby providing for .utilization of the perforations 21 for locking the adjacent drum at intermediate positions under the tension of ribbon 19.

Near the ends of the diverging portions 12', the side plates 11 are perforated to receive pins 22 which are spaced from portions 12, so that ribbon 19 may slide snugly between the pins and port-ions 12. l lind, in practice, that these pins 22 serve to retain the ribbon 19 in proper position and to clean them from adhered concrete when the ribbon is wound up for transportation.

rlhe ends of journals lll are squared for the ready reception of proper wrench or operating lever.

The side plates 11 preferably extend inwardly a short distance beyond the middle of plate 12, and these extended portions are perforated at 23, the extensions serving as a support for the main body of the structure upon the battens 13 of form 13 and perforations 23 permitting the insertion of a nail into the batten so as to hold the clamp temporarily in place.

In operation, the main body of the device may be placed in position at one corner of battens upon a column form; ribbon 19 passed around the form, and axes 14 dropped into the appropriate notches 13. Pins 22 are then placed in position and drums 14 wound up so as to draw the ribbon 19 rml'y around the battens of the column form, said drums being locked in place by the insertion of pins 20. While a single winding drum might be used it is, nevertheless, preferable to use two drums, both of which are readily removable from the main body as this facilitates the placing of the clamp and also makes it possible to more uniformly tension the ribbon 19 around the form. lt will be readily appreciated that by the use of a thin flexible, but strong, metal ribbon, the device will have ample strength and can be used in conjunction with forms widely varying in size.

I claim as my invention:

1. A form clamp comprising a main body, an anchor for one end of a iieXible clamping ribbon, a rotatable removable winding drum carried by the main body, a liexible clamping ribbon attached to the anchor and to the winding drum, the drum being laterally removable from the main body without detachment from the ribbon. l

2. A form clamp consisting of a main body having a portion adapted to engage a form, a Y pair of side plates` having open ended drum-receiving notches, a pair of drums removably journaled in said notches, means 'or preventing reverse rotation of said drums, and a clamping ribbon attached to said drums.

3. A form clamp consisting of a main body having a portion adapted to engage a form, a pair oi side plates extending upon both sides of said form-engaging portion and having open-ended drum-receiving notches at the outer edges of said plates, a pair of drums removably journaled in said notches, means for preventing reverse rotation of said drums, and a clamping ribbon attached to said drums.

4. A form clamp consisting of a Vmain body having a portion adapted to engage a forni, a pair of side plates having open ended drum-receiving notches, a drum jo-urnaled in said notches, a ribbon having one end attached to said drum, the adjacent portion of the ribbon lying along the adjacent portion 0f the main body, and a removable retainer projected through the side plates over the ribbon adjacent that portion of the main body along which the ribbon lies.

6. A form clamp consisting of a inain body having a portion adapted to engage a form, a pair of side plates having open ended drum-receiving notches, a drum removably journaled in said notches and provided at each end with a circumferential flange having a plurality of angularly spaced perforations, the side plates being perforated to reg istcr with the perforations of the drum, for the reception of a retaining pin.

InY witness whereof, I have hereunto set my hand at Chicago, Illinois, this ninth day ot July, A.V D. one thousand nine hundred and twenty.

vi/'ILLIAM B. LEGNARD. 

